Scraper for disk harrows.



PATENTED APR. 18, 1905.

C. P. A. PRIBERG.

GRAPBR FOR DISK HARROWS APPLICATION FILED FEB. 21. 1905.

Patented April 18, 1905.

FFICEG CHARLES P. A. FRIBERG. OF MOLINE, ILLINOIS, ASSIGNOR TO DEEREANI) MANSUR COMPANY, OF MOLINE, ILLINOIS, A CORPORATION OF ILLINOIS.

SCRAPER FOR DISK HARROWS.

SPECIFICATION forming part of Letters Patent No. 787,840, dated April18, 1905.

Application filed February 21,1905. Serial No. 246,731.

Be it known that I, Crranmns P. A. FRIBERG, 1 a citizen of the UnitedStates,res1ding at Mo- I that are secured in various ways to thescraper-shaft, and the shaft is mounted in bearings on the barrow-frameand provided with means wherebv it may be rocked.

There is one scraper for each disk, and the object in rocking the shaftto cause the blades to sweep across the face of the disks to scrape offthe adhering dirt, weeds, Sac. The blades are usually made of flatplates of steel having a certain degree of flexibility and presselastically against the face of the disks. It is desirable that theyshould be separately and individually adjustable along theirshaft, andit is also desirable that each blade should be detachably secured to theshaft, so as to permit it to be readily removed and restored to place orreplaced by another.

The present invention comprises a means for securing these scraperblades to their shaft, and it is characteristic of the invention that asingle means or device is provided to effect both the securement of thescraper to its shaft and the detachable fastening of the blade to itsclamp.

The invention is illustrated in the accompanying drawings, whereinFigure I shows a portion of a disk harrow in side elevation, and Figs. 2and 3 respec tively show face and edge views of one of thescraper-blades and the clamp which secures it to the shaft.

Referring to the views, (I indicates the usual, in bearings on theharrowframe and is provided with an upwardly-extending footlcver g. Theshaft has also a rearwardly-extending armf and a spring e, which reactsbetween the end of this arm, and a bracket a on the harrow-frame servesto hold the shaft normally in such a position that the scraperblades areheld with their point near the center of the disks.

The scraper extends radially from the shaft, as usual, and normallyoccupies the position illustrated in full lines in Fig. 1 but bypressing his foot upon the lever g the driver may rock the shaft againstthe tension of the spring 6 and cause the scraper-bhulc to sweeprearwardly against the face of the disk, as above described.

The scraper-shaft is preferably angular or square in cross-section, asillustrated in all the ligures, and each blade is secured thereto bymeans of a clamp 7L, consisting of two oppositely-disposed jaws i i,which are shaped at their upper ends to fit the shaft and con structcdat their lower ends to clamp the blade between the two jaws.

As illustrated in Figs. 2 and 3, each jaw of the clamp is slotted orrecessed on its inner side to receive the upper end of the bladeedgewise, and a single bolt 7): clamps the two jaws together around theshaft and on opposite edges of the blade, so that on loosening the boltthe clamp carrying the blade may be adjusted along the shaft and so,also, that by stillfurthcr loosening the bolt and separating the jawsthe blade may be entirely detached from the clamp.

In order to fasten the blade securely to its clamp, its opposite edgesnear the upper end are notched or cut away, as indiacted by dotted linesat Z in Fig. 2, and the recesses in the jaws of the clamp are providedwith corresponding lugs or projections in, that [it into the notches orcuts in the blade when the two jaws are clamped together and positivelyhold the blade against longitudinal movement in the recesses of thejaws.

Such being the construction and the manner of securing the clamp to theshaft and the blade to the clamp, it is to be noted that the inventionprovides in a single device a simpl and effective means for securing andadjusting the blade and clamp along the shaft and also for detachablysecuring the blade to its clamp or holder, and the same fastening viz,,the bolt kserves to effect both attachments-that is to say, it securesthe clamp to the shaft and fastens the scraper-blade to the clamp.

Having thus described the invention, what I claim, and desire to secure,is

1. The combination of a scraper-shaft, a scraper-blade, and a pair ofclamping-jaws forming a single means to'secure the scraper to the shaft,and to detachably fasten the blade to the clamp.

2. The combination, to form a means for securing a scraper-blade to itsshaft, of a pair of jaws having one end fitting the shaft, and the otherfitting the blade, and means for clamping the aws together on the shaftwith the blade between them.

3. The combination, to form a scraper with a detachable blade, of a pairof jaws i, i, recessed to receive the blade edgewise, a scraper-bladehaving notches or cuts Z, Z, in its edges, projections m, 'm, in therecesses of the jaws to fit the notches in the blade, and means forclamping the aws together.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES P. A. FRIBERG.

Witnesses:

N. GALVIN, J. W. SELLS.

